a CRect rc(x - 12, y - 12, x + 12, y + 12) pDC->Ellipse(&rc) str1.Format( \"%d\",j ) pDC->SetTextColor(RGB(255,0,0)) pDC->DrawText(str1,&rc,DT_CENTER DT_VCENTER DT_SINGLELINE) PaintArrow(pDC,RGB(255,0,0),G.vexs[prev[j]].x,G.vexs[p